C  5.1 - 10.0
D  10.1 - 15.0
E  15.1 - 20.0
B  0.0 - 5.0
F  20.1 - 25.0
G  25.1 - 32.0
A  < 0.0
H  32.1 - 40.0
I  > 40.0